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Ultrasonic velocities and Rao formalism in solutions of polyamic acids of differing molecular structures

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Summary

Ultrasonic velocity and density measurements have been made in solutions of polyamic acids of differing molecular structures over extended range of concentration at room temperature. It has been shown that the Rao formalism is applicable to polyamic acid solutions employing Nomoto equation. The consequence of the above finding is discussed for the structural analysis of polymers of complex structures. The flexibility of the polymer chains has also been discussed in terms of the compressibility evaluated from ultrasonic velocity and density data of polymer solution.

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Authors and Affiliations

  1. Defence Science Centre, Metcalfe House, 110 054, Delhi, India

    R. K. Gupta, I. D. Gaba & C. D. Pande

  2. Polymer Characterisation Laboratory, Materials Science Centre, Indian Institute of Technology, 721 302, Kharagpur, India

    R. P. Singh

Authors
  1. R. K. Gupta
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  2. I. D. Gaba
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  3. C. D. Pande
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  4. R. P. Singh
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Gupta, R.K., Gaba, I.D., Pande, C.D. et al. Ultrasonic velocities and Rao formalism in solutions of polyamic acids of differing molecular structures. Polymer Bulletin 8, 443–449 (1982). https://doi.org/10.1007/BF00265265

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  • DOI: https://doi.org/10.1007/BF00265265

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